Re: Self-heal Problems with gluster and nfs

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On 07/07/2014 06:58 PM, Norman Mähler wrote:
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Dear community,

we have got some serious problems with our Gluster installation.

Here is the setting:

We have got 2 bricks (version 3.4.4) on a debian 7.5, one of them with
an nfs export.
There are about 120 clients connecting to the exported nfs.
These clients are thin clients reading and writing their Linux home
directories from the exported nfs.

We want to change the access of these clients one by one to access via
gluster client.
I did not understand what you meant by this. Are you moving to glusterfs-fuse based mounts?



Here are our problems:

In the moment we have got two types of error messages which come in
burts to our glusterfshd.log

[2014-07-07 13:10:21.572487] W
[client-rpc-fops.c:1538:client3_3_inodelk_cbk]
0-gluster_dateisystem-client-1: remote operation failed: No such file
or directory
[2014-07-07 13:10:21.573448] W
[client-rpc-fops.c:471:client3_3_open_cbk]
0-gluster_dateisystem-client-1: remote operation failed: No such file
or directory. Path: <gfid:b0c4f78a-249f-4db7-9d5b-0902c7d8f6cc>
(00000000-0000-0000-0000-000000000000)
[2014-07-07 13:10:21.573468] E
[afr-self-heal-data.c:1270:afr_sh_data_open_cbk]
0-gluster_dateisystem-replicate-0: open of
<gfid:b0c4f78a-249f-4db7-9d5b-0902c7d8f6cc> failed on child
gluster_dateisystem-client-1 (No such file or directory)


This looks like a missing gfid file on one of the bricks.
I looked it up and yes the file is missing on the second brick.

We got these messages the other way round, too (missing on client-0
and the first brick).

Is it possible to repair this one by copying the gfid file to the
brick where it was missing? Or ist there another way to repair it?


The second message is

[2014-07-07 13:06:35.948738] W
[client-rpc-fops.c:2469:client3_3_link_cbk]
0-gluster_dateisystem-client-1: remote operation failed: File exists
(00000000-0000-0000-0000-000000000000 ->
<gfid:aae47250-8f69-480c-ac75-2da2f4d21d7a>/lock)

and I really do not know what to do with this one...
Did any of the bricks went offline and came back online?

Pranith


I am really looking forward to your help because this is an active
system and the system load on the nfs brick is about 25 (!!)

Thanks in advance!
Norman Maehler


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